/usr/include/Kokyu/DSRT_Direct_Dispatcher_Impl_T.cpp is in libkokyu-dev 6.2.8+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#ifndef DSRT_DIRECT_DISPATCHER_IMPL_T_CPP
#define DSRT_DIRECT_DISPATCHER_IMPL_T_CPP
#include "DSRT_Direct_Dispatcher_Impl_T.h"
#if !defined (__ACE_INLINE__)
//#include "DSRT_Direct_Dispatcher_Impl_T.i"
#endif /* __ACE_INLINE__ */
namespace Kokyu
{
/*
//@@VS: This is somehow not being recognized by MSVC, which results
//in a link error. For now, the definition has been moved to the .h
//file. Needs further investigation.
template <class DSRT_Scheduler_Traits>
int Comparator_Adapter_Generator<DSRT_Scheduler_Traits>::MoreEligible::
operator ()(const DSRT_Dispatch_Item_var<DSRT_Scheduler_Traits>& item1,
const DSRT_Dispatch_Item_var<DSRT_Scheduler_Traits>& item2)
{
int rc = qos_comparator_ (item1->qos (), item2->qos ());
//more eligible
if (rc == 1)
return 1;
//if equally eligible, then resolve tie with the creation time of
//the item
if (rc == 0 && item1->insertion_time () < item2->insertion_time ())
return 1;
return 0;
}
*/
template <class DSRT_Scheduler_Traits>
DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
DSRT_Direct_Dispatcher_Impl (ACE_Sched_Params::Policy sched_policy,
int sched_scope)
:DSRT_Dispatcher_Impl<DSRT_Scheduler_Traits>(sched_policy, sched_scope),
sched_queue_modified_ (0),
sched_queue_modified_cond_ (sched_queue_modified_cond_lock_)
{
//Run scheduler thread at highest priority
if (this->activate (this->rt_thr_flags_, 1, 0, this->executive_prio_) == -1)
{
ACE_ERROR ((LM_ERROR,
"(%t|%T) cannot activate scheduler thread in RT mode."
"Trying in non RT mode\n"));
if (this->activate (this->non_rt_thr_flags_) == -1)
ACE_ERROR ((LM_ERROR,
"(%t|%T) cannot activate scheduler thread\n"));
}
}
template <class DSRT_Scheduler_Traits> int
DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
init_i (const DSRT_ConfigInfo&)
{
return 0;
}
template <class DSRT_Scheduler_Traits> int
DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::svc (void)
{
ACE_hthread_t scheduler_thr_handle;
ACE_Thread::self (scheduler_thr_handle);
#ifdef KOKYU_DSRT_LOGGING
int prio;
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("max prio=%d\n")
ACE_TEXT ("min prio=%d\n")
ACE_TEXT ("active prio=%d\n")
ACE_TEXT ("inactive prio=%d\n"),
max_prio_,
min_prio_,
active_prio_,
inactive_prio_));
if (ACE_OS::thr_getprio (scheduler_thr_handle, prio) == -1)
{
if (errno == ENOTSUP)
{
ACE_ERROR((LM_ERROR,
ACE_TEXT ("getprio not supported\n")
));
}
else
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n")
ACE_TEXT ("thr_getprio failed")));
}
}
ACE_DEBUG ((LM_DEBUG, "(%t): Scheduler thread prio is %d\n", prio));
#endif /*DSRT_LOGGING*/
while(1)
{
ACE_GUARD_RETURN (cond_lock_t,
mon,
sched_queue_modified_cond_lock_,
0);
if (this->shutdown_flagged_)
break;
while (!sched_queue_modified_)
{
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T): sched thread about to wait on cv\n"));
#endif
sched_queue_modified_cond_.wait ();
}
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t|%T): sched thread done waiting on cv\n"));
#endif
sched_queue_modified_ = 0;
ACE_GUARD_RETURN (ACE_SYNCH_RECURSIVE_MUTEX,
synch_lock_mon,
this->synch_lock_,
0);
if (this->ready_queue_.current_size () <= 0)
continue;
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t|%T):Sched Queue contents===>\n"));
this->ready_queue_.dump ();
#endif
DSRT_Dispatch_Item_var<DSRT_Scheduler_Traits> item_var;
this->ready_queue_.most_eligible (item_var);
ACE_hthread_t most_eligible_thr_handle = item_var->thread_handle ();
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):curr scheduled thr handle = %d\n",
this->curr_scheduled_thr_handle_));
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):most eligible thr handle = %d\n",
most_eligible_thr_handle));
#endif
if (this->curr_scheduled_thr_handle_ != most_eligible_thr_handle)
{
if (this->curr_scheduled_thr_handle_ != 0)
{
if (ACE_OS::thr_setprio (this->curr_scheduled_thr_handle_,
this->inactive_prio_,
this->sched_policy_) == -1)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("thr_setprio on curr_scheduled_thr_handle_ failed.")));
ACE_DEBUG ((LM_DEBUG, "thr_handle = %d, prio = %d\n",
this->curr_scheduled_thr_handle_,
this->inactive_prio_));
}
}
if (ACE_OS::thr_setprio (most_eligible_thr_handle,
this->active_prio_, this->sched_policy_) == -1)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("thr_setprio on most_eligible_thr_handle failed")));
}
this->curr_scheduled_thr_handle_ = most_eligible_thr_handle;
this->curr_scheduled_guid_ = item_var->guid ();
}
/*change all threads in blocked_prio_ to inactive_prio_*/
this->ready_queue_.change_prio(this->blocked_prio_, this->inactive_prio_,this->sched_policy_);
}
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t): sched thread exiting\n"));
#endif
return 0;
}
template <class DSRT_Scheduler_Traits>
int DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
schedule_i (Guid_t id, const DSRT_QoSDescriptor& qos)
{
ACE_GUARD_RETURN (ACE_SYNCH_RECURSIVE_MUTEX, guard, this->synch_lock_, -1);
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):schedule_i enter\n"));
#endif
DSRT_Dispatch_Item<DSRT_Scheduler_Traits>* item;
ACE_hthread_t thr_handle;
ACE_Thread::self (thr_handle);
ACE_NEW_RETURN (item,
DSRT_Dispatch_Item<DSRT_Scheduler_Traits> (id, qos),
-1);
item->thread_handle (thr_handle);
if (this->ready_queue_.insert (item) == -1)
return -1;
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):schedule_i after ready_q.insert\n"));
#endif
if (ACE_OS::thr_setprio (thr_handle,
this->blocked_prio_,
this->sched_policy_) == -1)
{
ACE_ERROR_RETURN ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("thr_setprio failed")), -1);
}
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):schedule_i after thr_setprio\n"));
#endif
//ready_queue_.dump ();
/*first release ready_queue_ lock. Otherwise if the scheduler gets the
sched_queue_modified_cond_lock first, then try to get the ready_queue_ lock
just when one thread who gets the ready_queue_ lock first, then try to get
sched_queue_modified_cond_lock. Deadlock happens.
*/
guard.release ();
//@@ Perhaps the lock could be moved further down just before
//setting the condition variable?
ACE_GUARD_RETURN (cond_lock_t,
mon, this->sched_queue_modified_cond_lock_, 0);
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):schedule_i after acquiring cond lock\n"));
#endif
this->sched_queue_modified_ = 1;
this->sched_queue_modified_cond_.signal ();
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG,
"(%t|%T):schedule_i exit\n"));
#endif
return 0;
}
template <class DSRT_Scheduler_Traits>
int DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
update_schedule_i (Guid_t guid, const DSRT_QoSDescriptor& qos)
{
return this->schedule (guid, qos);
}
template <class DSRT_Scheduler_Traits>
int DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
update_schedule_i (Guid_t guid, Block_Flag_t flag)
{
ACE_GUARD_RETURN (ACE_SYNCH_RECURSIVE_MUTEX, guard, this->synch_lock_, -1);
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t): update schedule for block entered\n"));
#endif
DSRT_Dispatch_Item_var<DSRT_Scheduler_Traits> dispatch_item;
ACE_hthread_t thr_handle;
int found = this->ready_queue_.find (guid, dispatch_item);
if (found == 0 && flag == BLOCK)
{
thr_handle = dispatch_item->thread_handle ();
if (ACE_OS::thr_setprio (thr_handle,
this->blocked_prio_,
this->sched_policy_) == -1)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("%p\n"),
ACE_TEXT ("thr_setprio failed")));
}
//monitor released because cancel_schedule would acquire the
//lock. Using recursive mutex creates lock up.
//
//@@ Need to investigate this further. Also we can consider
//using the Thread-Safe interface pattern.
//mon.release ();
int rc = this->cancel_schedule (guid);
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t): update schedule for block done\n"));
#endif
return rc;
}
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t): update schedule for block done\n"));
#endif
return -1;
}
template <class DSRT_Scheduler_Traits> int
DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
cancel_schedule_i (Guid_t guid)
{
ACE_GUARD_RETURN (ACE_SYNCH_RECURSIVE_MUTEX, guard, this->synch_lock_, -1);
#ifdef KOKYU_DSRT_LOGGING
ACE_DEBUG ((LM_DEBUG, "(%t): about to remove guid\n"));
#endif
this->ready_queue_.remove (guid);
#ifdef KOKYU_DSRT_LOGGING
this->ready_queue_.dump ();
#endif
if (this->curr_scheduled_guid_ == guid)
{
this->curr_scheduled_guid_ = 0;
this->curr_scheduled_thr_handle_ = 0;
}
//release ready_queue_ lock first before getting another lock
guard.release ();
ACE_GUARD_RETURN (cond_lock_t,
mon, this->sched_queue_modified_cond_lock_, 0);
this->sched_queue_modified_ = 1;
this->sched_queue_modified_cond_.signal ();
return 0;
}
template <class DSRT_Scheduler_Traits> int
DSRT_Direct_Dispatcher_Impl<DSRT_Scheduler_Traits>::
shutdown_i ()
{
this->shutdown_flagged_ = 1;
ACE_GUARD_RETURN (cond_lock_t, mon, this->sched_queue_modified_cond_lock_, 0);
this->sched_queue_modified_ = 1;
this->sched_queue_modified_cond_.signal ();
// We have to wait until the scheduler executive thread shuts
// down. But we have acquired the lock and if we wait without
// releasing it, the scheduler thread will try to acquire it after
// it gets woken up by the above signal and it fails to acquire the
// lock. This will lead to a deadlock. So release the lock before we
// wait.
mon.release ();
this->wait ();
return 0;
}
}
#endif /* DSRT_DIRECT_DISPATCHER_IMPL_T_CPP */
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